Product Details

• Amazon Sales Rank: #752 in Consumer Electronics
• Color: silver
• Brand: Sanyo
• Model: GES-NH2700-4BP
• Dimensions: 2.00" h x .50" w x 2.25" l,
• Battery type: NiMh

Features

• 4-pack of 2,700 mAh AA NiMH rechargeable batteries for long-term use
• Batteries last up to 4 times longer than standard AA disposable alkalines
• Can be recharged up to 1,000 times without suffering from memory effect
• Ideal for digital cameras, portable DVD players, and other high-drain devices
• Superior materials built to maintain more capacity than other NiMH batteries

Amazon.com Product Description
Do away with disposable batteries and keep your portable electronics running for years with this four pack of GE/Sanyo AA rechargeable NiMH batteries. Built for long-lasting use, the 2,700 mAh batteries last up to four times longer than standard alkaline batteries, making them ideal for digital cameras, audio devices, and other high- drain electronics. More significantly, when they run out of power, you don't have to throw them away and clutter up the landfill. Simply put them in a charger and recharge them either fully or partially, depending on your needs. All told, these batteries can be recharged up to 1,000 times without experiencing a memory effect.

Customer Reviews

Sanyo 2700 mAh - one of the best
These are quality batteries w/ 2x's more power and [Longer RUNNING time] than most lower capacity NIMH batteries, including the "ready to use"/ Low self-discharge (LSD) types!

Never thought I would care about writing battery reviews, but the High capacity rechargeables are getting a bad rap from some reviewers b/c they have to be charged (before) use, in order to get back their capacity, after being left (un-used) for more than ~ 3-4wks. Their stored power when [NOT in USE / device turned OFF] is lost faster than batts that keep hold of theirs longer = the LSD types like Imedion 2100 mAh -or- Eneloop 2000 mAh.
-BUT these high capacity batts (2700- 2900 mAh) have an intended purpose, which is a reason the top companies make Both types in the 1st place.

[In Storage]
Yes, the LSDs are useful b/c they have a [Longer STORAGE time] (before needing to be recharged) than the high capacity types. Thus the LSDs are "ready to use" and good for seldom used devices & intermittent usage. However, this doesn't negate the effectiveness of 2700-2900 mAH made by quality brands.
[In Operation]
Not all users (all the time) need a rechargeable for good shelf-life... Some need it for High power & LONG run time for "shorter" segments = 1- 20 days (i.e., photo shoot, day-hike/bike/caving, day at the beach with ur RC (radio-controlled) toys, holiday lighting, etc, etc. And a quality brand (2700-2900 mAh) will do the job.

The decision is [WHEN] do you pick a :(High Capacity/ high self-discharge) -or- (Low Capacity/ Low Self- discharge)...Not picking the universal "better" one. The "best" would be a High capacity & LSD & Rechargeable all in one!- but that's not available yet.

Now, Sanyo's REAL competition is ( Powerex AA 2700mAh NiMH ). They're both good -I would pick 1 over the other, based on sale price or latest technology release.

Truthful advertising
These cells state a 2700mah capacity. But since cell capacities are frequently overstated for competitive reasons, one should always measure the effective capacity in your application. In my application, I expect a 400ma constant current drain. So I charged 4 cells and then discharged them at 400ma and recorded the capacities. They were quite uniform, which alone speaks to the quality of the cells, and had an average capacity of 2450mah. Yes, that's less than the 2700mah rating, but that rating is usually a 10 hour discharge rating. That is, at 270ma constant drain, the cells will take 10 hours to reach terminal voltage. So 2450mah at a 6 hour discharge rate tells me that Sanyo is justified in claiming 2700mah capacity. And there are lots of cells out there for which this is not true (like SunPak).

The strongest NiMH batteries available
First off - you need a good charger to get the most out of these batteries. Check out the BC-900 charger or the Maha chargers that have a display and can refresh or break-in a set of batteries.

After reading the other reviews of this battery and having used Sanyo's awesome Eneloop battery, I had to give these a try in my external flash.

Since I shoot weddings, I need something that helps speed up my flash recycle time and can last all day. These batteries fit that bill, and then some.

When I first got them and put them in the BC-900 charger (if you don't have one, get one - it's great.) That charger has a refresh mode that they recommend for new NiMH batteries to break them in. The first pass showed somewhere around 1500-1700mAh, so I was obviously a little concerned. I have two of those chargers and two sets of these batteries so I set one full set to 1000/500 cycle and the other set to 700/350 (BC-900 owners will know what this means.) After letting them run all afternoon and overnight, the 1000/500 set came out between 2610-2720mAh. The 700/350 set is hitting a high of 2760mAh but the whole set hasn't finished yet so it may go even higher.

Some brands increased the size of the battery slightly to be able to jam more capacity into the battery. Sanyo appears to adhere to the original AA size so getting them stuck shouldn't be an issue.

As of right now, Sanyo is definitely the king of the rechargeable battery hill. If you need a battery that can hold a charge for a long period of time, check out the Sanyo Eneloop battery.